但也不要表现的过于自信。

Don't act too confident, though.

youdao

在约会中不要表现的过头，自然一点。

Don't overdo anything on your date. Act naturally.

youdao

不过，要注意的是不要表现得卑躬屈膝。

However, be careful to not appear servile.

youdao

So,I'm telling you from the beginning, but don't dream and think that somehow the Final's going to be so much different from your regular day-to-day performance, but to give you some reason to live after the Midterm.

所以我在开始告诉你们,但是,不要以为你们的最终成绩,和你们的平时表现,没什么关系,但这能让你们不至于期中的时候就绝望了

耶鲁公开课 - 基础物理课程节选